Результаты исследований: Научные публикации в периодических изданиях › статья по материалам конференции › Рецензирование
Acoustic Phonons in Periodical GeSiSn/Si Nanostructures. / Anikin, K. V.; Timofeev, V. A.; Solonenko, D. и др.
в: Journal of Physics: Conference Series, Том 1461, № 1, 012005, 01.03.2020.Результаты исследований: Научные публикации в периодических изданиях › статья по материалам конференции › Рецензирование
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TY - JOUR
T1 - Acoustic Phonons in Periodical GeSiSn/Si Nanostructures
AU - Anikin, K. V.
AU - Timofeev, V. A.
AU - Solonenko, D.
AU - Nikiforov, A. I.
AU - Milekhin, A. G.
AU - Zahn, D. R.T.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - We apply Raman spectroscopy to study the phonon spectrum in periodical GeSiSn/Si nanostructures with Sn concentration varied from 0 to 20%. In the optical spectral region, an insignificant shift of the phonon mode positions with a variation of the Sn content prevents determination of Sn concentration relying only on the optical phonons behavior. In the acoustic region, we observe the doublets of the folded acoustic phonons, the spectral positions of which undergo the low-frequency shift with increasing the Sn content. The application of the elastic continuum model with the linear approximation of sound velocity via Sn content in GeSiSn layers fails to explain the experimental results. This indicates a nonlinear Sn concentration dependence of sound velocity in GeSiSn layers which describes well the positions of the folded acoustic phonons.
AB - We apply Raman spectroscopy to study the phonon spectrum in periodical GeSiSn/Si nanostructures with Sn concentration varied from 0 to 20%. In the optical spectral region, an insignificant shift of the phonon mode positions with a variation of the Sn content prevents determination of Sn concentration relying only on the optical phonons behavior. In the acoustic region, we observe the doublets of the folded acoustic phonons, the spectral positions of which undergo the low-frequency shift with increasing the Sn content. The application of the elastic continuum model with the linear approximation of sound velocity via Sn content in GeSiSn layers fails to explain the experimental results. This indicates a nonlinear Sn concentration dependence of sound velocity in GeSiSn layers which describes well the positions of the folded acoustic phonons.
UR - http://www.scopus.com/inward/record.url?scp=85084117565&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1461/1/012005
DO - 10.1088/1742-6596/1461/1/012005
M3 - Conference article
AN - SCOPUS:85084117565
VL - 1461
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012005
T2 - 4th International Conference on Metamaterials and Nanophotonics, METANANO 2019
Y2 - 15 July 2019 through 19 July 2019
ER -
ID: 24229223